Lesson 3.3.13.4
3.3.13.4 DNA Quiz: AQA Chemistry, Unit 3
20 questions
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Lesson 3.3.13.4, DNA: 20 multiple choice questions for the AQA Chemistry (7405), Unit 3: Organic chemistry, written with Revision Ninja.
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The 20 questions
-
Which three components react together to form a single DNA nucleotide?
- Phosphate, 2-deoxyribose, base
- Phosphate, ribose, base
- Phosphate, glucose, base
- Sulfate, 2-deoxyribose, base
-
Which base is NOT found in DNA?
- Thymine
- Cytosine
- Guanine
- Uracil
-
What type of sugar is 2-deoxyribose in DNA?
- A disaccharide
- A pentose sugar
- A hexose sugar
- A triose sugar
-
What type of chemical bond links adjacent nucleotides together in a single DNA strand?
- Dative bond
- Hydrogen bond
- Covalent bond
- Ionic bond
-
How many strands make up a DNA double helix?
- One
- Two
- Four
- Three
-
How many hydrogen bonds form between adenine and thymine?
- 1
- 2
- 3
- 4
-
Which base pair forms three hydrogen bonds?
- Guanine and cytosine
- Thymine and cytosine
- Adenine and thymine
- Adenine and guanine
-
If one DNA strand reads A-T-G-C, what is the sequence of the complementary strand?
- A-T-G-C
- T-A-C-G
- G-C-T-A
- C-G-A-T
-
How many hydrogen bonds form between an adenine base and a thymine base in DNA?
- One
- Two
- Three
- Four
-
Which ion links 2-deoxyribose molecules together to form the backbone of a DNA strand?
- Carbonate ion
- Phosphate ion
- Sulfate ion
- Nitrate ion
-
If 30% of one DNA strand is adenine, what percentage of thymine is in the complementary strand?
- 60%
- 70%
- 30%
- 20%
-
Which component of a DNA nucleotide is responsible for giving DNA a net negative charge?
- Adenine base
- 2-deoxyribose sugar
- Thymine base
- Phosphate group
-
During DNA replication, what function do the separated single strands serve?
- Inhibitor
- Enzyme
- Template
- Catalyst
-
Which type of interaction holds two complementary strands together in a DNA double helix?
- Ionic bonding
- Metallic bonding
- Hydrogen bonding
- Covalent bonding
-
In a single DNA strand, to which component of the backbone are the nitrogenous bases attached?
- 2-deoxyribose sugar
- Nitrogen atom
- Hydrogen bond
- Phosphate ion
-
How many hydrogen bonds are present in 10 A-T base pairs?
- 40
- 20
- 30
- 10
-
Which bonds break when a DNA double helix is separated into single strands by heating?
- Hydrogen bonds
- Covalent bonds
- Peptide bonds
- Disulfide bonds
-
To which component of a DNA nucleotide is the nitrogenous base directly bonded?
- Phosphate ion
- Hydrogen atom
- 2-deoxyribose
- Ribose
-
How many hydrogen bonds form between guanine and cytosine in a DNA double helix?
- Four
- Two
- Three
- One
-
Which bases are purines?
- Guanine and thymine
- Adenine and guanine
- Adenine and cytosine
- Thymine and cytosine
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